Marker for leather graders



Dec. 18, 1923. 11,477,633

' L. A. COGSWELL MARKER FOR LEATHER GRADERS Filed Oct. 6, 1922 Patented Dec. 1%, 1923.

near

TJEANDER A. ooeswntri, or nanonnsrni MANUFACTURING COMPANY, TION' OF MAINE.

J7 OF IrIAl CEIESTER, NEW? In. LT EPSHIEE, IL C JRPGRA- HAMPSH'E, ASSIGNOB T9 LACENE HEAR/KER FOR LEATHER GRADEBS.

Application filed October To aZZ whom it may concern:

Be it known that I, LEANDER A. CocswnLL, a citizen of the United States, residing at Manchester, in the county of Hillsboro and State of New Hampshire, have invented an Improvement in Markers for Leather Graders, of which the following description, in connection with the accompan ing drawings, is a specification, like letters on the drawings representing like parts.

In the latest evening and gradng machines of the Lacene Manufacturing Company (being my machines and those of Elmer P. Nichols and covered by our respective patents and pending applications) particular emphasis is laid upon speed of output, and my latest machine is designated as a speed-up'machine in which there is an automatic feed which carries the blanks rapidly, one after the other, into through the detecting mechanism to be operated upon by the various grading mechanisms, all at as, high rate of speed as is possible. This brings into more prominence the problems of momentum, lost motion, etc, and in connection with the marker or stamp it makes desirable a positive ineansfor preventing the tendency to chatter or to continue rotating or swinging at the movement of marking, which would result in stamping upon the leather either a blurred mark or portions of two marks. Accordingly my present invention has for its object the provision of a marker of the kind commonly found in the well-known Nichols patents for instance in Patent N 0. 1,130,321, March 2, 1915) provided with means for preventing chattering, swinging or improper motion at the instant of marking the leather.

While my invention may have difierent mechanical embodiments I have herein shown the same in a. very simple form applied to the rotary marker of the Nichols type, but do not intend to restrict my invention thereto except as otherwise required by the claim at the end of this specification.

In the drawings,

Fig. l is a longitudinal vertical sectional view taken in the plane of the dotted line 1, Fig. 2, showing the parts up:

Fig. 2 is a vertical cross sectional view taken on the dotted line 22, Figs, 1 and 4;

Fig. 3 is a sectional detail similar to Fig.

6, 1922. Serial No. 592,914.

2 in part, showing the marker down in the position when marking; and

Fig. d is a vertical longitudinal sectional view, the same Fig. 1, excepting that it shows the parts in the position they assume when down.

ll lounted on the bridge or cross-head 1, which is aconvenientfixed part-of the frame of the grading machine, is sliding neinberor head 2 (the same as shown in FigsfG and T of said Nichols patent) in which is pivoted at its lower end marking wheel or rotary stamp 3 fast on a shaft l provided at the end opposite the rotary marker with a. pinion 5 by which said marker is rotated to its proper adj ustinent by a segmental rack G at the lower end of a lever '7 pivoted at 8 and caused to swing by an operating link 9 in response to the adjustment of the sliding rack (not shown, but designated as 26 in said patent) to which it is pivoted at 11. All this, together with the further operating connections and pa in the complete ma chine are described in detail in said patent to which reference is made, and, therefore, further detailed description herein is omitted. Su'llice it to say that a long bearing for the slide-head 2 is provided by an extension 12 of the casting 1 to give true vertical. movement when the lifter cam and dropper 13 (designated 65 in said patent) releases the marker and permits to be instantly driven down with great force and suddenn ss by the pressure arm 14. and its heavy spring 15 acting with reference to the pivot 16. This vertical drop of the mar er takes place just as the rotation of the marker wheel under the swinging adjustment of the rack 6 has taken place, and in fact, it may begin just as this adjustment is ceasing, but has not quite ceased. JV hen operating these machines at low speed, the construction thus far described was usually suflicient, but when operating them at high speed, the momentum of the rotating wheel and the swinging rack and the combination of other motions and forces produces a chatter, or blurring, or double marking. Accordingly, to render this impossible, while yet maintaining the desired speed and keeping the rotary die as the most practical form and the other swinging parts, I fit a stiff plate or post 17 in a slot 18 formed in the bridge casting 1 and pref- .as in said patent.

gaged by said tooth or stop 20, preferably with a close fit. The pins are preferably round and the upper end of the tooth is preferably wedge shape and the position of the tooth is such that it is entirely out of range of said pins when the marking wheel is.

up and when it is descending and is still being rotated or adjusted but is in range with said pms when the marking wheel is down.

In operation the marking wheel is'ad- JLlStGCl as usual by the sw nging of the segmental raok 6 on the pinlon and this takes place while the parts are up as shown .in Fig. 1 and may continue an instant longer, as the wheel begins to fall. The instant, however, that it has fallen so as to bring the upper-most pair of pins into juxtaposition with the teeth or stop 20 the latter enters between said pins, or rather the pinsfall on either side of said tooth straddling the same tightly, and positively locking the marking wheel 3 against the slightest chatter or lateral movement at and justbefore the instant of stamping impact. This restricts the stamping movement absolutely to a true vertical blow on the leather. In some kinds of leather, instead of a steel cutting die. a rubber stamp is necessary, and it will be seen that my invention is equally applicable to both of these kinds ofstamping wheels. I have also shown in the drawings a size wheel 7 7 and its adjacent parts lettered 78, 80, 81, This is turned by hand as stated in said patent, and, therefore, a spring-held ball-and-socket holding device of the kind shown is sufficient but would be inoperative for the wheel 3. This is because said wheel 3 must beperfectly free to'turn for its delicate adjustments and yet when locked the look must be strongly. resistant and positive asthelockingtakes place atthe moment of su'dden'and intense movement. This'moveiiienijfis not' -only at the instant of the exceedingly quick down and up stamping movement, but the lock is called upon toresist the quick lateral movement of the swinging parts and the rotating parts. The necessity for instantaneous down and up movement-is dueto the fact that the stamping takes place without halting the forward feeding movement of the leather blank being stamped. In this type of machine the leather blank never halts or hesitates in its travel from the time it is automatically fed into the machine at one end until it is automatically deposited at theother end after having been measured, stamped, skived and distributed,

Claim:

In a machine of the kind described, in combination with the cross head of the frame, a slide mounted forvertical reciprocation on the cross head, a rotary stamp j ournaled on said slide below the cross head, a series of shoulders arranged in a circle on one side of the rotary stamp, a member rigidly'fixed to the cross head and extending downwardbesidethe stamp and close to said shoulders, and a projection on said fixed member extending toward the side of the stamp and inside the circle of shoulders when the stamp is in elevated'position and adapted to engage a pair of the 'shoulders and lock the stamp when the stamp is in depressed position.

In testimony whereof, I have signed my name tothis specification, in the presence of two subscribingwitnesses.

LEANDER A, COGSWELL. Witnesses:

GEO. H. MAXWELL, JOHN B. Rain. 

